Wedding photographer Vanessa Joy wrote an article on Fstoppers about mirrorless cameras.
I've read the article and it's ridiculous. While having seen Vanessa Joy's photos, I can't say that she isn't a good photographer, because she is, but this article is plain bullshit.
While there are times when mirrorless cameras still aren't on par with DSLR's, what's limiting them the most of the time is the person using the camera, myself included.
And here's a great video in response to that article, made by SONY Artisan of Imagery, Jason Lanier. And while I'm not a huge fan of SONY cameras myself I do agree with Jason most of the time (not always though), and he is spot on with this video.